From 0e005c102417c907b7dd0ec48a45739fafe54f59 Mon Sep 17 00:00:00 2001
From: acondolu <andrea.condoluci@unibo.it>
Date: Mon, 10 Jul 2017 14:13:36 +0200
Subject: [PATCH] Arity inherited only in the case (true, min_int) Problem 25
 fails because a fake variable becomes critical step.

---
 ocaml/num.ml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ocaml/num.ml b/ocaml/num.ml
index d59d07f..2cb9b73 100644
--- a/ocaml/num.ml
+++ b/ocaml/num.ml
@@ -200,7 +200,7 @@ and subst truelam delift_by_one what (with_what : nf) (where : nf) =
  let aux_propagate_arity ar = function
  | `Lam(false,`Match(`I(v,args),(x,_),liftno,bs,args')) when not delift_by_one ->
     `Lam(false,`Match(`I(v,args),(x,ar),liftno,bs,args'))
- | `Var(i,_) -> `Var(i,ar)
+ | `Var(i,oldar) -> `Var(i, if truelam && oldar = min_int then ar else oldar)
  | _ as t -> t in
  let rec aux_i_num_var l =
   function
-- 
2.39.2